b43legacy: Fix unload oops if firmware is not available

The asyncronous firmware load uses a completion struct to hold firmware
processing until the user-space routines are up and running. There is.
however, a problem in that the waiter is nevered canceled during teardown.
As a result, unloading the driver when firmware is not available causes an oops.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index 572668821862e3c8c9b75b46ec1d1e60ea25dcea..349c77605231a660dbf398b3a93a13978715de3d 100644 (file)
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -3919,6 +3919,7 @@ static void b43legacy_remove(struct ssb_device *dev)
         * as the ieee80211 unreg will destroy the workqueue. */
        cancel_work_sync(&wldev->restart_work);
        cancel_work_sync(&wl->firmware_load);
+       complete(&wldev->fw_load_complete);
 
        B43legacy_WARN_ON(!wl);
        if (!wldev->fw.ucode)